You don't have to. [As in, he's definitely going to. He sits up rummaging through his coat to procure and pull on a pair of gloves. As if they'll prevent much. They're just latex.

Next comes his wand, which is probably something he should have pulled out earlier, given the fact with a mutter of petrificus totalus the once-person is frozen in place.] My spells... do not last long here. Hopefully more people will arrive before it regenerates. Or... something.

[There he goes, going to touch its slimy face. Even pull back the skin around its mouth as if it were nothing.] It looks like... they aren't the original monster.